Tell me the algorithm, is there a formula?

1+2+3+……n ≤320≤ 1+2+3+……n+(n+1), that is, n(n+1) 2 320 (n+1)(n+2) 2n takes an integer, and solves n=24 (no need to solve in detail, just substitute the integer value to satisfy this formula) then 1+2+3+......n =300

1+2+3+……n+（n+1）=325

That is, the 300th number is 24, the 301st number is 25, and all the way to the 325th number is 25

So the 320th number is 25

The above inequality is the formula for this problem, and the n+1st number is the value sought.

In addition, inequalities should be carefully considered when taking equals.

a1=1, a2=2, a3=4, a4=7, which means that the first number starts with 1, the second number starts with 2, the fourth number starts with 3, and the seventh number starts with 4, then the formula an=1+n*(n-1) 2 means that the first + n*(n-1) 2 numbers start with n, and when 1+n*(n-1) 2=320 can get n=, which can be known as 25

According to the law, the number is equal to the number, so it is counted as 1+2+3+......The sum of n is less than and closest to 320, then the next number is what is sought.

Summary. Kiss, haven't you touched all this money you have earned together? Or is it that some of the 12,190 you spent was taken out of the 32,000?

If none of you have touched the 32,000, then you can divide it evenly, but if you take out some money from the 32,000, you only need to subtract the money from the equal share, and now you didn't tell me if you took out how much of the 32,000 you spent yourself.

How to calculate, give a specific algorithm formula?

Kiss, do you have a question? Can you send me a look at it?

No. There's no title for that, and I don't know which algorithm formula you want?

My colleagues and I did some work, and earned a total of 10,000 yuan, and I spent 2,190 yuan on my own home, and he also spent 2,545, asking how much each person shared.

Okay, kiss.

Dear, do you and your colleagues want to share equally? Or you guys take the money by a few points.

Deuce. Okay, dear, this will do the math for you.

Kiss, that's the end result.

Excuse me, dear, do you have any questions?

No, I spent 12190, and he spent 2545 my money.

How much money should each person get back.

We didn't spend a total of 10,000 yuan, we spent it in our own family, so dear, this money you have earned together, are you not touching the potatoes at all? Or is it that some of the 12,190 you spent was taken out of the 32,000? If none of you have touched the 32,000, then you can divide it evenly, but if you take out some money from the 32,000, you only need to subtract the money from the equalization, and now you didn't tell me if you took out how many acres of acres from the 32,000 and returned it to spend for yourself.

So you didn't touch the money, and the 32,000 was spent with money other than 32,000?

A spends $744 and B spends $1,212.

The two spent a total of 744 + 1212 = 1956 yuan.

One and a half is 1956 2 = 978 yuan.

Therefore, A needs to give B 978-744 = 234 yuan.

The cost for two is half for one person.

Solution: If 120 kilograms of water should be added with x grams of salt, according to the title, it will be:

100：10=120000：x

To solve this ratio, you get:

100x=1200000

x=12000

A: 120 kg of water should be added with 12,000 g of salt.

From 15 to 20, there are a total of 20-15+1 6 classmates.

45-6 39 (pcs).

So, there are 39 students left.

Note that 1 is to be added.

You need to know that the upper left corner is the same as the lower right corner, and the later binary system of equations can be solved.